Add function to invert system with multiple rhs vectors
Add some more plots in parse.py
Remove uneeded test of cli blocking
Rename python test scripts in check_jacobians to match others
Initial commit of work on block prec for llg itself
Add dummy preconditioner to throw away Ms dofs in ms-pinned problems

So that the LLG preconditioners are independent of the Magnetostatics
stuff.
Move construction of SoM preconditioners into factory where they belong

Also add virtual preconditioner factory function for later.
Rewrite llg preconditioner factories to be more modular
Initial commit of llg subblock preconditioner
Add TR compatibility in some dmdt auxiliary calculations
Move initial m and happ factories into llg_factorys header